User's Manual

EX7100 Technical Manual - Module Descriptions
©1999 Exicom Technologies (1996) Ltd 7-59 Issue 3 - May 2001
Figure 7.30: Modem/Controller Fault Diagnostic Tree
Begin
EX7100 LCD
operational?
Pow er Supply
Voltages OK?
Sw itch on EX7100 Terminal with
Top Cover Removed
D501 on continuously?
D104 should be off.
D103 (Red LED) flashes
once then stays off?
Suspect that
Modem/Controller
module is faulty
Suspect that the Pow er
Supply module is faulty
Yes
No
No
No
Ref er to Pow er
Supply Module
Section 7.2
Suspect that the Front
Panel module or
Modem/Contr oller module
is faulty
Yes
Refer to Front
Panel Module
Section 7.12
Replace Front Panel
module
EX7100 LCD
operational?
Yes
Replace
Modem/Controller
module
No
Caution: Antenna
output
must be
terminated in 50 Ohms
Yes
D100, D101 and D102
turn on sequentially?
Modem/Controller module
appears to be fault-free,
suspect that another
Module is faulty
Yes
Finish
No